diff --git a/lld/MachO/Config.h b/lld/MachO/Config.h
--- a/lld/MachO/Config.h
+++ b/lld/MachO/Config.h
@@ -122,6 +122,7 @@
   bool dataConst = false;
   bool dedupLiterals = true;
   bool omitDebugInfo = false;
+  bool warnStrict = false;
   uint32_t headerPad;
   uint32_t dylibCompatibilityVersion = 0;
   uint32_t dylibCurrentVersion = 0;
diff --git a/lld/MachO/Driver.cpp b/lld/MachO/Driver.cpp
--- a/lld/MachO/Driver.cpp
+++ b/lld/MachO/Driver.cpp
@@ -1258,6 +1258,7 @@
   config->icfLevel = getICFLevel(args);
   config->dedupLiterals = args.hasArg(OPT_deduplicate_literals) ||
                           config->icfLevel != ICFLevel::none;
+  config->warnStrict = args.hasArg(OPT_warn_strict);
 
   // FIXME: Add a commandline flag for this too.
   config->zeroModTime = getenv("ZERO_AR_DATE");
@@ -1274,7 +1275,7 @@
 #endif
 
   if (const Arg *arg = args.getLastArg(OPT_install_name)) {
-    if (config->outputType != MH_DYLIB)
+    if (config->warnStrict && config->outputType != MH_DYLIB)
       warn(arg->getAsString(args) + ": ignored, only has effect with -dylib");
     else
       config->installName = arg->getValue();
diff --git a/lld/MachO/Options.td b/lld/MachO/Options.td
--- a/lld/MachO/Options.td
+++ b/lld/MachO/Options.td
@@ -73,6 +73,9 @@
     Group<grp_lld>;
 def O : JoinedOrSeparate<["-"], "O">,
     HelpText<"Optimize output file size">;
+def warn_strict: Joined<["--"], "warn-strict">,
+    HelpText<"Warn on extra checks that ld64 does not perform">,
+    Group<grp_lld>;
 
 // This is a complete Options.td compiled from Apple's ld(1) manpage
 // dated 2018-03-07 and cross checked with ld64 source code in repo
diff --git a/lld/test/MachO/install-name.s b/lld/test/MachO/install-name.s
--- a/lld/test/MachO/install-name.s
+++ b/lld/test/MachO/install-name.s
@@ -2,13 +2,17 @@
 
 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t.o %s
 
-# RUN: %no_fatal_warnings_lld -o %t.exec %t.o -install_name foo 2>&1 \
-# RUN:     | FileCheck --check-prefix=WARN %s
+# RUN: %no_fatal_warnings_lld --warn-strict -o %t.exec %t.o \
+# RUN:     -install_name foo 2>&1 | FileCheck --check-prefix=WARN %s
 # RUN: llvm-objdump --macho --all-headers %t.exec \
 # RUN:     | FileCheck --check-prefix=NO-ID %s
 
-# RUN: %no_fatal_warnings_lld -bundle -o %t.bundle %t.o -install_name foo 2>&1 \
-# RUN:     | FileCheck --check-prefix=WARN %s
+# RUN: %no_fatal_warnings_lld --warn-strict -bundle -o %t.bundle %t.o \
+# RUN:     -install_name foo 2>&1 | FileCheck --check-prefix=WARN %s
+# RUN: llvm-objdump --macho --all-headers %t.bundle \
+# RUN:     | FileCheck --check-prefix=NO-ID %s
+
+# RUN: %lld -bundle -o %t.bundle %t.o -install_name foo 2>&1
 # RUN: llvm-objdump --macho --all-headers %t.bundle \
 # RUN:     | FileCheck --check-prefix=NO-ID %s